Grinding-machine.



No. 693,47I.

(No Model.)

Patented Feb. I8,v |902.

0. s. WALKER.

,.enmnms mAcHmE. (Application filed Aug. 18, 1900;)

' 3 Sheets-Sheet l.

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'110. 693,471.l Pfented Feb. la, |902.

0. S. 'WAILKER. GRINDING MACHINE.

(Apllication led Aug. 1B, 1900.) nu Manel.) l 3v sheets-sheet 2.

- 1:1: 'Noms Farms ca. Fumawmm wAsHmu-ron j:A c.

:60.693,471; t j Patented Feb, la, |902..

' s 0. S. WALKER 'v anmnme Mamma.v

. (Anneau-ion' :ma Aug. 1s, 1,900.)

(No llodel.) y 3 Sheets-Sheet 3.

t UNITED STATES PATENT OFFICE.

OAKLEY S. VA'LKER, OF WORCESTER, MASSACHUSETTS.

GRINDING-MACHINE.

srncrrlcn'rron forming pari-.of Letters Patent No. 693,471, dated February 1s, 1902.

Applicata nea Eugenie, ieoo. serai No. 27,306. (No modem A To all whom, t waag/.concerna- Be it known that I, OAKLEY S. WALKER,

a citizen of the United States, residing at Worcester, in the county of Worcester and Commonwealth of Massachusetts, have in- Vented a new and Auseful Improvement in Grrinding-lviachines,` of which the following is a specification, accompanied by drawings forming a part of the same, in which- Figure 1 represents a front view of a grinding-machine embodying my invention. Fig. 2 is a vertical sectional view on the line 2 2, Fig. l, of a portion of the machine, showing the belt connection with theA arbor of the grinding-wheel. Fig. 3 is a sectional view on line 3 3, Figs. 1 and 5, of a stand supporting one of the work-holding spindles. Fig. 4 is a rear View, on a larger scale, of a stand supporting one ofthe Work-holding spindles with the screw-threaded collar adjusting the spindle shown in sectional view. Fig. 5 is a top View. Fig. 6 is a sectional view on line 6 6, Fig. 5. Fig. 7 is an end view of the table upon which the work is supported. Fig. 8 is a sectional view through the bearings of the grinding-wheel arbor with la portion of the arbor and the device for holding the grinding-wheel thereon being shown in central sectional view. Figs. 9 and 10 showrside and rear viewsof a device for holding milling-cutters-in position to be sharpened in my improved grinding-machine. Fig. 1l is la detachedview of one of the jaws by which the Vcutterlis held.

Similar reference-figures refery to similar parts in the different views.

The object of my invention is to produce a grinding-machine for the surface grinding of metals, the grinding of shafts or arbors, milling and reaming cutters, 'and metal-work of Various kinds; and my invention has for its objects to provide an improved means for` driving the grinding-wheel, by which it may be adjusted vertically and also at different angles to the work, to provide an improved means for attaching the grinding-wheel toits arbor, and in various novel instrumentalities for holding-and adjusting the work and for increasing the range-and efficiency ofthe madenotes a portion of the supporting stand vor `postupon which the operative parts of the machine are mounted.

2-is a bed capable of a sliding motion on ways 3 by means of a hand-wheel 4 and the usual actuating mechanism employed in machines of this class, by which the bed 2 may be moved on the ways 3 toward or away from the grinding-wheel.

Supported by the framework at the rear ouf the bed 2 is acylindrlcalshell 5, journaled in a vertical bearing 6, in which it is capable of being turned and clamped therein by aclamping-bolt 7 in order' to bring the arbor of the grinding-wheel into any desired position. Within the shell 5 is a cylindrical block 8, capable of vertically sliding within the shell 5, but held from rotation by apin 9, held in the block 8 and entering a groove 10 in the shell 5. The block 8 carries a pin 11, upon which is journaled a belt-pulley 12, running loosely thereonv and serving as a tightening-pulley for a driving-belt 13, which extends from a pulley upon an overhead counter-shaft (not shown) around the arbor 14 of the grinding-wheel and around a fixed pulley 15, turning upon a pin 16, held in the shell 5, and around the tightening-pulley 12, the driving-belt passing into lthe shell 5 through an opening 17 and out of the shell 5 through an opening 18.v The axis of the tightening-pulley l 2 passes through the axis of the shell 5 and the'center line of the belt 13 on its driving side or where it enters the opening17 coincides with the axis of theshell, so that the Alatter may beturned to Vary the position of the grinding-wheel without affecting the operation of the belt 13. Passing through the bottom of the verticallysliding block 8 is a concentric screw 19, journalcd in the framework ot' the machine and held from longitudinal movement and engaging a nut 20 in the bottom of the shell 5. The screw 19 carries a bevel-gear 2l in engagement with the bevel-gear 22 upon the shaft.

ICO

Wheel-arbor14, which is shown in detail inI l Fig. 8, is provided with a central cylindrical section 26 to form a belt-pulley to receive the driving-belt 13 and the two tapered sections 27 27, fitting tapered boxes or bearings 28,f

held in the upper end of the cylindrical shell 5.

Fitting the tapered ends 27 of the arbor 14 is a flanged collar 29, upon which the grinding-wheel 30 is fastened in the usual manner by means of a removable collar 31, fitting the external screw-threaded section of the lian ged collar 29. The end of the langed collar 29 is provided with a concentric recess 32 to receive and hold a nut 33, which is screwed upon the screw-threaded pin 34, held in the end of the arbor 14. A dowel-pin 35 passes through the holding-collar 33 and enters the end of the llanged collar 29 to prevent the holding-nut 33 from turning. The opposite tapered end of the arbor 14 is also provided with a screw -threaded pin 36, oppositely threaded to the pin, 2st-that is, one of the pins has a right-hand and the other a lefthand screw-thread-and a grinding-wheel carried upon the flanged collar 30 may be applied to either of the tapered ends of the arbor 14 and held in place by holding-collars 33, it only requiring two collars-one with a right-hand thread and the other with a lefthand thread-to secure it on either end of the arbor. The grinding-wheels are held upon flanged collars or collets 29, each having a reversed end for a holding-nut 33, and when it is desired to change the grinding-wheel it is held from rotation and the arbor turned in the opposite direction to the screw-threaded collar 33, causing the collar to be unscrewed from its pin 34, and the holding-nut 33 applied to the recessed end of another wheelcollet, which is applied to the arbor.

The work to be ground, capable of being held between centers, is supported upon centers 37 37, held in stands 38 38, capable of being adjustably fixed upon the ways or track 39, extending lengthwise the table 40, which is pivoted at 41 upon a plate 42, capable of a longitudinal sliding motion in Ways on the bed 2 by means of a hand-wheel 43, and actuating mechanism (not shown) usually employed in such machines-such, for example, as a rack and pinion. The stands 38 are provided at their upper ends with sleeves 44, open on one side and provided with clamping-bolts 45, by which the centers 37 are held. The sleeve 44 of one of the stands 38 projects from the stand and is provided with an external screw-thread 4G to receive a collar 47, having an internal screwthreaded liange 48, which engages a screw-thread 49 on the spindle 37 and having a dierent pitch from the screw-thread 46, so that the rotation of the collar 48 will move the spindle center carried thereby a distance equal to the dilerence of the movements caused by the two screw-threads 46 and 49. Each of the stands 38 slides upon a dovetailed track or way 37 and is fastened in position by a clamping-plate 50 and a bolt 51, passing obliquely through the stand and adapted to draw the clamping-plate against the dovetailed track. The table upon which the stands 38 are supported is capable of being slightly rocked on its pivot 4l and adjusted in order to bring the line ot' motion of the table obliquely to the axis of the grinding-wheel arbor for the purpose of grinding the work upon a bevel or taper, and this adjustment is accomplished by providing the table at one end with a short slot 52 and the plate 42 beneath it with a longer slot 53. Bolts 54 and 55 pass through the slots 52 and 53 and through plates 56 and 57 to clamp the plates 56 and 57 upon the top of the table 40 and beneath the plate 42.

than the table 40, so that by loosening the bolts 54 and 55 the table 40 can be quickly swung on its pivot 41, carrying the bolts 54 and 55 through the slot 53 to approximately its desired position, when the bolt 55 is tightened and a closer adjustment is obtained by means of the adjusting-screws 59 and 60, held in lugs 61 and 62, projecting from the plate 57, said screw bearing against an arm 63, projeeting from the end of the table 40, and the table is clamped by the tightening-bolt 55. The opposite end ot' the table (shown in Fig. 7) is provided with an index-plate 56 to indicate the angle at which the table is set relatively to its line of motion.

In grinding, milling, and othercutters having shanks, such as those shown in Figs. 9 and 10 of the drawings at 64 and 65, l hold them by their shanks 66 by means of a cutter-holding device (shown in Figs. 9 and 10) consisting of a stand 67, adapted to be adjustably fastened to the dovetailed track 39 and carrying a V-shaped rest 68 and a jaw 69, held in a frame 70, which is vertically adjustable on the stand 67 by means ot a slot 71 and clamping-bolt 72. The jaw 69 is loosely held in the frame 70 by pins 73, entering slots 74 in the frame, and is adjustable in the frame to cause its edge to bear evenly upon the shank 66 of the cutter by means of screws 75, entering the jaw 69, and ,a set-screw 76, bearing against the jaw 69.

What I claim as my invention, and desire to secure by Letters Patent, is-

1. The combination with the supportingframework, of a shell capable of a vertical adj ustment on said framework and also capable of turning about a vertical axis, an adjusting-screw coincident with the axis of said shell, by which said shell is vertically adjusted, an arbor journaled in said shell and a grinding-wheel carried in said arbor, substantially as described.J

2. The combination in a grinding-machine of a revolving arbor, and a grinding-Wheel carried by said arbor, a frame supporting said arbor and capable of being turned about an axis at right angles to the axis of said arbor, a belt-pulley carried by said arbor, and an idle pulley for maintaining the driving-belt with the center line of its driving side coin- The bolt 54 holds a washer 58 between' the plate 56 and the plate 42 slightly thicker` IOO TIO

cident with the axis of rotation of said sup- I porting-frame, substantially as described.

3. The combination of the rotating shell 5, a grinding-wheel arbor journaled therein, said shell being capable of turning aboutan axis at right angles to the axis of said arbor, a beltpulley on said arbor, a pulley journaled on a iixed stud in position to wrap the driving-belt on said driving-pulley and to receive the belt in a plane coincident with the axis of said shell and a pulley by which the direction of the belt is reversed, substantiallyY as described.

4. The combination with a head and an arbor journaled therein, said head being capable of turning about an axis at right angles to the axis of said arbor, a driving-pulley on said arbor to receive a driving-belt, an idle pulley by which the belt is wrapped around said' driving-pulley, and a second idle pulley by which the direction of the belt is changed, substantially as described.

5. The combination of a head and an arbor journaled therein, said head being capable of turning about an axis at right angles to the axis of said arbor, a driving-belt, an idle pulley by which the belt is wrapped around said driving-pulley, a second idle pulley by which the direction of the belt is changed, and means for vertically adjusting said head independently of the position of said second-idle pulley, substantially as described.

6. The combination with a revolving arbor and abelt-pulley carried thereon, of a pulley 'on a fixed st-ud in position to Wrap the belt on said driving-pulley, a pulley bywhich the direction of the belt is changed and means for exerting a pulling strain'on the latter pulley to take up the slack in the belt, substantially as described.

7. In a grinding-machine the combination with a grinding-wheel, of a plate capable of a longitudinal movement past the grinding, wheel, of a table pivotally'connected with said plate, whereby it is capable of being rocked 58, lugs 6l, 62, adjusting-screws 59 and 60 and an arm 63, whereby the said-table is adj usted on its pivotal connection with said plate, substantially as described.

9. In a grinding-machine, the combination with a screw-threaded Work-supporting center and a screw-threaded sleeve' holding said center, ofa screw-threaded collar engaging both said sleeve and said center and havingv yits screw-threads of dierent pitch, whereby.

said center is moved longitudinally in its sleeve by the rotation of said collar, substan-4 tially as described.

10. The kcombination of the verticallyad justable frame 70, a jaw 69 held in said frame, and screws 75 and 76 by which said jaw is adj usted to bear evenly upon, the work, substantially as described.

1l. The combination of a hollow or tubular supporting-head, an arbor journaled therein and provided with a driving-pulley, and a pair of idle pulleys journaled Within said tubular head, substantially as described.

12. The combination of a tubular head, an arborsjournaledtherein and provided with a driving-pulley, an idle pulley supported-by said head by which the belt is wrapped around said driving-pulley, a secondvidle pulley by which the direction of the belt is changed, a support for said second idle pulley within said tubular head, and having a spline connection therewith, ,substantially as described.

Dated this 14th day of August, 1900.

OAKLEY S. WALKER.

Witnesses:

RUFUS B. FOWLER, M. C. PRICE. 

